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https://bugzilla.tianocore.org/show_bug.cgi?id=767 The USB I/O Protocol function ControlTransfer() has a DataLength parameter that specifies the size of the Data buffer. The UsbBusDxe module implements the USB I/O Protocol using the services of the USB2 Host Controller Protocol. The DataLength parameter in the USB2 Host Controller Protocol ControlTransfer() service is an IN OUT parameter so the number of bytes actually transferred is returned. Since the USB I/O Protocol ControlTransfer() service can not return the number of bytes actually transferred, the only option if the number of bytes actually transferred is less than the number of bytes requested is to return EFI_DEVICE_ERROR. The change fixes an issue with a USB mass storage device that responds with 0 bytes to the Get MAX LUN command. Cc: Star Zeng <star.zeng@intel.com> Cc: Eric Dong <eric.dong@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.